---
title: "T1125 - Low Temperature Hot Water (LTHW) Software Modelling at Gateway Building, Southend on Sea"
ocid: "ocds-b5fd17-b17e890f-4666-4955-9eec-0a898c553384"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-b5fd17-b17e890f-4666-4955-9eec-0a898c553384"
markdown_url: "https://d3tenders.com/contract/ocds-b5fd17-b17e890f-4666-4955-9eec-0a898c553384.md"
json_url: "https://d3tenders.com/contract/ocds-b5fd17-b17e890f-4666-4955-9eec-0a898c553384.json"
source: "Contracts Finder"
current_stage: "Award"
buyer: "UNIVERSITY OF ESSEX"
published: "2025-09-10"
---

# T1125 - Low Temperature Hot Water (LTHW) Software Modelling at Gateway Building, Southend on Sea

Buyer: UNIVERSITY OF ESSEX  
Current stage: Award  
OCID: ocds-b5fd17-b17e890f-4666-4955-9eec-0a898c553384

[View canonical contract page](https://d3tenders.com/contract/?ocid=ocds-b5fd17-b17e890f-4666-4955-9eec-0a898c553384)  
[Download OCDS JSON](https://d3tenders.com/contract/ocds-b5fd17-b17e890f-4666-4955-9eec-0a898c553384.json)

## Summary

The University of Essex, located in Colchester, is conducting a public procurement process for "T1125 - Low Temperature Hot Water (LTHW) Software Modelling at Gateway Building, Southend on Sea." Classified under the hydraulic equipment industry category, this tender aims to develop a detailed software model of the LTHW heating system to optimise energy use and reduce carbon emissions. The project, with a value of £20,000, has reached the award stage. The procurement process was initiated earlier this year, with the tender period concluding on 31st January 2025. The contract is scheduled to run from 18th March 2025 to 18th March 2026. The successful supplier is "Hydronic System Optimisation Ltd," based in London.

This tender presents significant opportunities for companies specialising in hydraulic systems, energy efficiency, and software modelling. Businesses with expertise in hydronic behaviour simulation, energy optimisation, and sustainable heating solutions will find this project particularly appealing. Large enterprises and firms with the capability to analyse and optimise heating systems, as well as to propose environmentally friendly and cost-efficient improvements, are well positioned to compete in such tenders, fostering growth and expanding their expertise in the burgeoning field of energy management.

## Notice

The University of Essex is seeking tenders to create a detailed software model of the Gateway Buildings Low-Temperature Hot Water (LTHW) heating system, aimed at analysing system performance, identifying inefficiencies, and recommending improvements to optimise energy use and reduce carbon emissions and utility costs. The overall scope of the project is to create a model that will simulate the hydronic behaviour of the LTHW system, taking into account full hydraulic system configuration and components, control logic, variable outside temperature conditions based on localised weather data and variable building heating/cooling load (minimum resolution 1 hour). Calculation engines must account for both hydraulic behaviour and thermal energy flows at a full system level.

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Contracts Finder |
| Latest notice | https://www.contractsfinder.service.gov.uk/Notice/7cc024c5-ea0d-441d-9997-a25ab4cdbae8 |
| Notice type | Award Notice |
| Procurement type | Standard |
| Procurement category | Works |
| Procurement method | Not Specified |
| Procurement method details | Not specified |
| Tender suitability | Not specified |
| Awardee scale | Not specified |
| All stages | Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 10 Sep 2025 |
| Submission deadline | 31 Jan 2025 |
| Future notice date | Not specified |
| Award date | 9 Sep 2025 |
| Contract period | 18 Mar 2025 - 18 Mar 2026 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | £20,000 |
| Lots value | Not specified |
| Awards value | Not specified |
| Contracts value | Not specified |

## Status

| Field | Value |
| --- | --- |
| Tender status | Complete |
| Lots status | Not specified |
| Awards status | Active |
| Contracts status | Not specified |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | UNIVERSITY OF ESSEX |
| Locality | COLCHESTER |
| Post town | Colchester |
| Postcode | CO4 3SQ |
| Country | England |
| ITL 1 | TLH East (England) |
| ITL 2 | TLH3 Essex |
| ITL 3 | TLH34 Essex Haven Gateway |
| Local authority | Colchester |
| Electoral ward | Wivenhoe |
| Westminster constituency | Harwich and North Essex |
| Delivery location | Not specified |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 1 |
| Supplier names | HYDRONIC SYSTEM OPTIMISATION |

## CPV Codes

### Divisions

- 43 - Machinery for mining, quarrying, construction equipment

### Codes

- 43328100 - Hydraulic equipment

## Release History

- 10 Sep 2025 at 09:50 - Award - Award Notice - https://www.contractsfinder.service.gov.uk/Notice/7cc024c5-ea0d-441d-9997-a25ab4cdbae8

## Documents

- https://www.contractsfinder.service.gov.uk/Notice/7cc024c5-ea0d-441d-9997-a25ab4cdbae8
  10th September 2025 - Awarded contract notice on Contracts Finder
- https://supplierlive.proactisp2p.com/Account/Login?cid=UNIESSEX
  For further details and to register your interest please go to

## Provenance

This Markdown file is an alternate public rendering of the D3 Tenders contract record. The canonical page is https://d3tenders.com/contract/?ocid=ocds-b5fd17-b17e890f-4666-4955-9eec-0a898c553384. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-b5fd17-b17e890f-4666-4955-9eec-0a898c553384.json.